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What are the physiological consequences of atrial fibrillation with a rapid ventricular rate, and what is the purpose of carotid massage?

Biology

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Answer

C

Here are the answers to the questions:

  1. The correct answer is C.

    • Step 1: Atrial fibrillation with a rapid ventricular rate of 150 beats per minute (bpm) can lead to a decrease in cardiac output.
    • Step 2: When cardiac output is significantly reduced, the body's tissues, including the brain, do not receive adequate blood flow.
    • Step 3: This can manifest as symptoms of hypoperfusion, such as hypotension (low blood pressure) and dizziness due to reduced cerebral blood flow.

  2. The correct answer is D.

    • Step 1: Carotid massage is a vagal maneuver used
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